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Date: Thu, 14 Jan 1999 17:12:55 +0900
To: FreeBSD-users-jp@jp.freebsd.org
From: BunpeiMatoba <bm@pt.smicec.co.jp>
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References: <199901070649.PAA06156@pluto.mach.kokusaidenki.co.jp>
 <Your message of "Wed, 6 Jan 1999 20:49:30 JST".<199901061149.AA01411@28410u.ube-ind.co.jp>
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Subject: [FreeBSD-users-jp 37475] Re: BIOS (Re: y2k problem)
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$B=;6b@)8f$NE*>l$G$9!%(B

At 15:49 99/01/07 +0900, okamoto@mach.kokusaidenki.co.jp (Kayoko Okamoto) wrote:
> $B!X(BFreeBSD $B$,(B BIOS $B$+$i;~4V$rFI$`$N$O5/F0;~$@$1$@$+$i!"(B
> $BF0$-B3$1$F$$$k8B$jFC$KLdBj$O@8$8$J$$!Y(B
> $B$3$N2r<a$O@5$7$$$N$G$7$g$&$+(B?

kernel$B$N%?%$%^!<$d;~4V$O$D$.$N$h$&$K=i4|2=$5$l$F$$$/$H(B
$BM}2r$7$^$7$?(B.

1.TIMER 8253$B$H(BRTC(Real Time Clock)$B$N=i4|2=(B

  main$B$+$i8F$S=P$5$l$k(B
  initclocks ( kern/kern_clock.c )$B$,8F$S=P$9(B
  cpu_initclocks ( i386/isa/clock.c )$B4X?t$NCf$G(B
  $B!!(BIRQ0 8253
  $B!!(BIRQ8 RTC
$B!!$N=i4|2=!$3d$j9~$_%Y%/%?!<%;%C%H$J$I$,9T$o$l$k!%(B

2. $B%7%9%F%`%?%$%`$N=i4|@_Dj(B

$B!!(Bxxx_vfs_mountroot ( kern/init_main.c)$B$K4X$9$k(B
$B!!(Bvfs_mountroot$B!!(B(kern/vfs_conf.c)$B4X?t$,$=$NCf$G(B
$B!!(B
>        /* root mount, update system time from FS specific data*/
>        inittodr( mp->mnt_time);
  $B$H$$$&7A$G(Binittodr$B$r8F$S=P$7$F=i4|2=$9$k!%(B
$B!!$3$N$H$-!$(BRTC$B$K$=$l$^$GJ];}$7$F$$$?CM$H(B
$B!!%U%!%$%k%7%9%F%`$N;~9o$,%Y!<%9$H$7$F;H$o$l$F%;%C%H$5$l$k!%(B

3. $B$=$N8e$N(BRTC$B$NCM$N:F%;%C%H!$FI$_=P$7$J$I(B
  settimeofday$B$,8F$P$l$k$H(BRTC$B$NCM$N:F%;%C%H$N(Bresettodr$B4X?t$,<B9T$5$l$k!%(B
$B!!$7$+$7!$%+!<%M%kFb$G!$(Binittodr$B$r8F$S=P$9$N$O!$(B
$B!!(Bnfs$B$K4X$7$F(Bnfs/nfs_vfsops.c$B$NCf$H(B
$B!!(Bapm$B$K4X$7$F(Bapm/apm.c$B$NCf$@$1!%!J$H;W$$$^$9!%(Bntp$B$r=|$-$^$9!K(B
$B!!(B
$B=>$C$F!$!V(BFreeBSD$B$,(BRTC$B$+$i;~4V$rFI$`$N$O5/F0;~$@$1!W(B
$B$H9M$($F$h$$$H;W$$$^$9(B.

$B0c$C$F$$$?$i$4;XE&$/$@$5$$(B.

$B$H$3$m$G(Bgettimeofday$B$O(BRTC$B$G$O$J$/(B
$B%+!<%M%k$N;~9o%?%$%^!<$rFI$s$G$$$^$9!%(B

$B$^$?!$%+!<%M%k%G%P%C%,!<(Bddb$B$N%3%^%s%I(B
show rtc
$B$+2?$+$G$G(BRTC$B$NCM$rFI$`$3$H$,$G$-$k$i$7$$$N$G$9$,!$(B
$B$I$J$?$+;n$5$l$?J}$*$i$l$^$9$+!)(B

--
Bunpei Matoba
Computer System Division
SuMIkin Control Engineering Corp. 
Amagasaki Japan
Phone: +81-6-418-4707    fax. +81-6-418-4764 
Nifty-Serve: JAE00767   CompuServe: 72300,3551
http://www.nerimadors.or.jp/~bunpei/index.html
